ALLETE has entered an agreement to be acquired by a partnership led by Canada Pension Plan Investment Board and Global Infrastructure Partners and start the process to become a private company. Learn more at www.ALLETEforward.com.

SEC Filings

Filing date Form Description View
U-3A-2

Statement by holding company claiming exemption from provisions of the act under Rule 2

View HTML
424B2

Form of prospectus filed in connection with primary offering of securities on a delayed basis

View HTML
SC 13G/A

An amendment to the SC 13G filing

View HTML
S-3

Simplified registration form

View HTML
10-Q/A

Amendment to a previously filed 10-Q

View HTML
10-Q/A

Amendment to a previously filed 10-Q

View HTML
10-Q/A

Amendment to a previously filed 10-Q

View HTML
424B3

Form of prospectus reflecting facts events constituting substantive change from last form

View HTML
424B3

Form of prospectus reflecting facts events constituting substantive change from last form

View HTML
424B3

Form of prospectus reflecting facts events constituting substantive change from last form

View HTML